【Daily Question】Chemical Analysis Version, 10.23.2019
Thread Content
This post was last edited by zjp on 2019-10-23 08:10. Those who are willing to take on responsibilities in managing industry regions are invited to reply at https://bbs.hcbbs.com/thread-2776127-1-1.html; there are generous monthly salary rewards available! Single-choice question: The substance that can be used both for calibrating NaOH solution and for calibrating KMnO4 is ( ). A、 H2C2O4•2H2O ； B、Na2C2O4 ； C, HCl ； D H2SO4. A
A、 H2C2O4•2H2O
A、 H2C2O4•2H2O